8 results on '"Alice Kanyua"'
Search Results
2. Comparison of equations for estimating glomerular filtration rate in screening for chronic kidney disease in asymptomatic black Africans: a cross sectional study
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Geoffrey Omuse, Daniel Maina, Jane Mwangi, Caroline Wambua, Alice Kanyua, Elizabeth Kagotho, Angela Amayo, Peter Ojwang, and Rajiv Erasmus
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MDRD ,CKD-EPI ,Cockcroft-Gault ,FAS ,eGFR ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Abstract Background Several equations have been developed to estimate glomerular filtration rate (eGFR). The common equations used were derived from populations predominantly comprised of Caucasians with chronic kidney disease (CKD). Some of the equations provide a correction factor for African-Americans due to their relatively increased muscle mass and this has been extrapolated to black Africans. Studies carried out in Africa in patients with CKD suggest that using this correction factor for the black African race may not be appropriate. However, these studies were not carried out in healthy individuals and as such the extrapolation of the findings to an asymptomatic black African population is questionable. We sought to compare the proportion of asymptomatic black Africans reported as having reduced eGFR using various eGFR equations. We further compared the association between known risk factors for CKD with eGFR determined using the different equations. Methods We used participant and laboratory data collected as part of a global reference interval study conducted by the Committee of Reference Intervals and Decision Limits (C-RIDL) under the International Federation of Clinical Chemistry (IFCC). Serum creatinine values were used to calculate eGFR using the Cockcroft-Gault (CG), re-expressed 4 variable modified diet in renal disease (4v–MDRD), full age spectrum (FAS) and chronic kidney disease epidemiology collaboration equations (CKD-EPI). CKD classification based on eGFR was determined for every participant. Results A total of 533 participants were included comprising 273 (51.2%) females. The 4v–MDRD equation without correction for race classified the least number of participants (61.7%) as having an eGFR equivalent to CKD stage G1 compared to 93.6% for CKD-EPI with correction for race. Only age had a statistically significant linear association with eGFR across all equations after performing multiple regression analysis. The multiple correlation coefficients for CKD risk factors were higher for CKD-EPI determined eGFRs. Conclusions This study found that eGFR determined using CKD-EPI equations better correlated with a prediction model that included risk factors for CKD and classified fewer asymptomatic black Africans as having a reduced eGFR compared to 4v–MDRD, FAS and CG corrected for body surface area.
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- 2017
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3. Determination of reference intervals for common chemistry and immunoassay tests for Kenyan adults based on an internationally harmonized protocol and up-to-date statistical methods.
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Geoffrey Omuse, Kiyoshi Ichihara, Daniel Maina, Mariza Hoffman, Elizabeth Kagotho, Alice Kanyua, Jane Mwangi, Caroline Wambua, Angela Amayo, Peter Ojwang, Zul Premji, and Rajiv Erasmus
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Medicine ,Science - Abstract
BackgroundDue to a lack of reliable reference intervals (RIs) for Kenya, we set out to determine RIs for 40 common chemistry and immunoassay tests as part of the IFCC global RI project.MethodsApparently healthy adults aged 18-65 years were recruited according to a harmonized protocol and samples analyzed using Beckman-Coulter analyzers. Value assigned serum panels were measured to standardize chemistry results. The need for partitioning reference values by sex and age was based on between-subgroup differences expressed as standard deviation ratio (SDR) or bias in lower or upper limits (LLs and ULs) of the RI. RIs were derived using a parametric method with/without latent abnormal value exclusion (LAVE).ResultsSex-specific RIs were required for uric acid, creatinine, total bilirubin (TBil), total cholesterol (TC), ALT, AST, CK, GGT, transferrin, transferrin saturation (TfSat) and immunoglobulin-M. Age-specific RIs were required for glucose and triglyceride for both sexes, and for urea, magnesium, TC, HDL-cholesterol ratio, ALP, and ferritin for females. LAVE was effective in optimizing RIs for AST, ALT, GGT iron-markers and CRP by reducing influence of latent anemia and metabolic diseases. Thyroid profile RIs were derived after excluding volunteers with anti-thyroid antibodies. Kenyan RIs were comparable to those of other countries participating in the global study with a few exceptions such as higher ULs for TBil and CRP.ConclusionsKenyan RIs for major analytes were established using harmonized protocol from well-defined reference individuals. Standardized RIs for chemistry analytes can be shared across sub-Saharan African laboratories with similar ethnic and life-style profile.
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- 2020
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4. Complete blood count reference intervals from a healthy adult urban population in Kenya.
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Geoffrey Omuse, Daniel Maina, Jane Mwangi, Caroline Wambua, Kiran Radia, Alice Kanyua, Elizabeth Kagotho, Mariza Hoffman, Peter Ojwang, Zul Premji, Kiyoshi Ichihara, and Rajiv Erasmus
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Medicine ,Science - Abstract
BACKGROUND:There are racial, ethnic and geographical differences in complete blood count (CBC) reference intervals (RIs) and therefore it is necessary to establish RIs that are population specific. Several studies have been carried out in Africa to derive CBC RIs but many were not conducted with the rigor recommended for RI studies hence limiting the adoption and generalizability of the results. METHOD:By use of a Beckman Coulter ACT 5 DIFF CP analyser, we measured CBC parameters in samples collected from 528 healthy black African volunteers in a largely urban population. The latent abnormal values exclusion (LAVE) method was used for secondary exclusion of individuals who may have had sub-clinical diseases. The RIs were derived by both parametric and non-parametric methods with and without LAVE for comparative purposes. RESULTS:Haemoglobin (Hb) levels were lower while platelet counts were higher in females across the 4 age stratifications. The lower limits for Hb and red blood cell parameters significantly increased after applying the LAVE method which eliminated individuals with latent anemia and inflammation. We adopted RIs by parametric method because 90% confidence intervals of the RI limits were invariably narrower than those by the non-parametric method. The male and female RIs for Hb after applying the LAVE method were 14.5-18.7 g/dL and 12.0-16.5 g/dL respectively while the platelet count RIs were 133-356 and 152-443 x10(3) per μL respectively. CONCLUSION:Consistent with other studies from Sub-Saharan Africa, Hb and neutrophil counts were lower than Caucasian values. Our finding of higher Hb and lower eosinophil counts compared to other studies conducted in rural Kenya most likely reflects the strict recruitment criteria and healthier reference population after secondary exclusion of individuals with possible sub-clinical diseases.
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- 2018
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5. Prevalence, Species Distribution and Antifungal Susceptibility Profile of Candida Species Isolated from Bloodstream of Critical Care Unit Patients in a Tertiary Care Hospital in Kenya
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Caroline Wangari Ngugi, Alice Kanyua, Andrew Nyerere, and Danait Andemichael Solomon
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medicine.medical_specialty ,biology ,business.industry ,Candida lusitaniae ,biology.organism_classification ,Candida parapsilosis ,Intensive care unit ,law.invention ,Flucytosine ,Candida tropicalis ,Candida auris ,law ,Internal medicine ,medicine ,business ,Candida albicans ,Fluconazole ,medicine.drug - Abstract
The upsurge of candidemia in the past years has been an immense encumbrance on public health and the number of deaths caused by candidemia particularly in critical care unit patients is devastating. Candida species harbor a 30% - 60% mortality rate and compared to stable people or those with less serious illnesses, this ranges from 60% to 80% of those who are chronically ill patients. Grounded on a recent report from a tertiary care hospital in Kenya showing the emergence of previously unobserved species: Candida auris, this study aimed to determine the prevalence, species distribution, and antifungal susceptibility profile of candidemia in critical care unit patients of the hospital. 378 Critical Care Unit patients were enrolled for the study from January 2019 to January 2020. Positive archived isolates were sub-cultured using Saboraud Dextrose Agar. Candida species were identified utilizing API20C AUX and Vitek-2. Antifungal susceptibility testing was conducted using the Liofilchem MIC Test strip. Out of 378 patients, thirty-one presented a positive culture for Candida species. The prevalence of Candidemia was 8.2% with 9 (29.03%) Candida auris, 8 (25.81%) Candida albicans, 6 (19.35%) Candida parapsilosis, 3 (9.68%) Candida famata, 3 (9.68%) Candida tropicalis, 1 (3.23%) Candida duobushaemolumonii, and 1 (3.23%) Candida lusitaniae. A resistance pattern to Fluconazole was observed among Candida auris and Candida parapsilosis, and resistance to Flucytosine was observed in Candida tropicalis, whereas susceptible MIC values were obtained for the other drugs. There is an increase in candidemia among critical care unit patients in the health facility posing a public health challenge. Moreover, the onset of new species Candida auris which is unprecedented in Kenya warrants enhanced infection control, and the uniform resistance of Candida auris, Candida parapsilosis, and Candida tropicalis towards Fluconazole and Flucytosine necessitate constant drug monitoring for empirical treatment regime. In contrast, the high potency of Echinocandins and Amphotericin-B demonstrate them as the drug of choice.
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- 2021
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6. Candida auris Outbreak Control in Critical Care Units in a Tertiary-Care Hospital in Nairobi, Kenya
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Evaline Sang, Alice Kanyua, Loice Ombajo, Felister Musyoki, Joyce Mwangi, Elizabeth L. Berkow, Rachel Njoroge, Paul Makau, Elizabeth Bancroft, Margaret Ngirita, Bolivya Olasya, Rose Ngugi, Ulzii-Oshikh Luvsansharav, and Mitsuru Toda
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Microbiology (medical) ,medicine.medical_specialty ,Infectious Diseases ,Candida auris ,Epidemiology ,business.industry ,Emergency medicine ,medicine ,Tertiary care hospital ,Outbreak control ,business - Abstract
Background:Candida auris is an emerging pathogen associated with nosocomial outbreaks. During January to May 2019, 11 invasive cases of C. auris were identified in the intensive care unit (ICU) and high-dependency unit (HDU) at a hospital in Nairobi, Kenya. We report on the interventions implemented to control the outbreak. Methods: Intensified infection prevention and control (IPC) interventions were implemented. All patients infected or colonized with C. auris were placed in single-patient rooms with strict contact precautions. Cleaning of the patient care environment was enhanced by instituting a 3-step procedure of cleaning with soap and water, disinfecting with 0.5% chlorine, and rinsing with water. Glo-Germ gel was used to evaluate the cleaning processes, and percentage of missed surfaces was calculated. Hand hygiene training and compliance observations were conducted to enforce adherence to hand hygiene. The IPC team provided training and observational feedback of IPC to staff, patients, and their families. The IPC interventions were guided by screening activities. To monitor ongoing transmission, a biweekly point-prevalence survey (PPS) was performed to screen all previously negative ICU and HDU patients for C. auris. Furthermore, admission and contact screening were added to guide patient placement. Screening was conducted by collecting a composite swab from the bilateral axilla and groin. Samples were incubated in salt dulcitol broth for 5 days at 40°C then subcultured onto Sabouraud dextrose agar. Colony identification was performed using a Vitek 2 system (bioMérieux). Results: In total, 177 patients were placed in single-patient rooms under contact precautions during May–August 2019. We conducted 123 environmental cleaning observations, and the percentage of missed surfaces decreased from 71% (10 of 14) in June to 7% (1 of 16) in August. Hand hygiene compliance among ICU and HDU staff was 79% (204 of 257) in May, 71% (159 of 223) in June, 73% (170 of 233) in July, and 81% (534 of 657) in August. In total, 283 screening swabs from 234 patients were processed during May–August 2019. Overall, 18 of 88 PPS swabs (20%), 13 of 180 admission screening swabs (7%), and 0 of 15 contact screening swabs (0%) were positive for C. auris. The PPS results showed a rapid decrease in colonization: 6 of 14 (43%) in May, 12 of 54 (22%) in June, 9 of 98 (9%) in July, and 1 of 70 (2%) in August. No new C. auris infections were identified from June to October 2019. Conclusions: The control of C. auris in a hospital outbreak requires multimodal interventions, including enhanced IPC interventions, PPS, admission and contact screening for colonization, rigorous monitoring, and team effort.Funding: NoneDisclosures: None
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- 2020
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7. Characteristics of Candida auris Patients at a Tertiary-Care Hospital, 2017–2019, Nairobi, Kenya
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Edith Muthui, Elizabeth Bancroft, Loice Ombajo, Cheptoo Bore, Phoebe Juma, Jackson Brendan R, Mitsuru Toda, Joan Osoro-Mbui, Malcolm Correia, and Alice Kanyua
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Microbiology (medical) ,Mechanical ventilation ,medicine.medical_specialty ,Epidemiology ,business.industry ,medicine.medical_treatment ,medicine.disease ,Sepsis ,Pneumonia ,Catheter ,Infectious Diseases ,Candida auris ,Intensive care ,Internal medicine ,medicine ,Infection control ,business ,Central venous catheter - Abstract
Background:Candida auris is of global concern due to its increasing frequency in intensive care units (ICUs), reported resistance to antifungal agents, propensity to cause outbreaks, and persistence in clinical environments. We investigated an increase in C. auris cases in an ICU in Kenya to determine the source of transmission and to control the spread of the disease. Methods: To identify cases, we reviewed laboratory records of patients with blood cultures yielding C. auris and organisms for which it is commonly misidentified by Vitek 2 v 8.01 software (ie, C. haemulonii, C. duobushaemulonii and C. famata) during January 2018–May 2019. We retrospectively reviewed medical charts of C. auris patients to extract information on demographics, underlying conditions, hospital procedures, treatments, and outcomes. We also enhanced infection control efforts by implementing contact precautions, equipment, and environmental disinfection, and hand hygiene training and compliance observations. Results: We identified 32 C. auris patients (Fig. 1). Median patient age was 55 years (IQR, 43–65), and 57% were male. Length of hospitalization before C. auris isolation was 30 days (IQR, 14–36). All had been admitted to the ICU. The most common reasons for admission were sepsis (50%), pneumonia (34%), surgery (25%), and stroke or other neurologic diagnosis (25%). Underlying comorbidities included hypertension (38%), diabetes mellitus (25%), and malignancy (29%). Two patients had HIV. Moreover, 61% of cultures yielded multidrug-resistant bacteria. Also, 33% of the patients had been admitted to this hospital in the preceding 3 months; 21% had been admitted to a hospital outside of Kenya; and 10% had been admitted to another hospital in Kenya in the previous year. Almost all (97%) had a central venous catheter, 45% had an acute dialysis catheter, 66% had an endotracheal tube, and 34% had a tracheostomy, with 69% receiving mechanical ventilation before C. auris isolation. Most (94%) had urinary catheters, 84% had nasogastric tubes, 91% had received total parenteral nutrition, and 75% had received blood products. All patients received broad-spectrum antibiotics and 49% received an antifungal before C. auris isolation. All-cause in-hospital mortality was 64% for the 28 patients whose outcomes were available. Following implementation of a hand hygiene campaign and improved equipment and environmental disinfection, no further cases were identified. Conclusions: We identified C. auris bloodstream infections associated with high all-cause mortality in a Kenyan hospital ICU. All patients had treatments and procedures suggesting severe underlying illness. Enhanced infection control contained the outbreak.Funding: NoneDisclosures: None
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- 2020
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8. Analysis of the Main Factors that Cause High Labour Turnover in Fuel Oil Retail Outlets: A Study of Petrol Stations in Nakuru Town, Kenya
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Kimemia, Alice Kanyua, Kamunjeru, Naomi, Kimemia, Alice Kanyua, and Kamunjeru, Naomi
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High labour turnover can destabilize a business due to various challenges such as; the high costs of recruitment and replacement; hidden organization costs; workers’ taxing monetary and psychological costs as well as costs of disrupted work schedules. Petrol stations were chosen because high labour turnover among pump attendants had been identified to be among the most challenging aspects when operating a petrol station in Kenya. Yet, the energy business is at the core of all development efforts in any economy. The study used an exploratory research design where questionnaires were given to the respondents of the petrol stations. The population for the study consisted of 477 staff drawn from 32 petrol stations. The sample size of 33% for pump attendants and leavers was found to be sufficient to determine the precision with which population values were extracted. Factor Analysis revealed that labour turnover is influenced by several factors and the leading factor was poor pay. Keywords: Attrition, Branded Petrol Stations, Forecourt attendants, High labour turnover, Independent Petrol Station, Labour turnover, Leavers, Wastage
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- 2014
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